Thanks for your interest in the security of jython.org and for going to the trouble of assembling this report.
If there were a problem here, it would be with maven.org, not with jython.org. But I think there isn't.
In the page you've generated, these (relative) links don't actually go anywhere. However, a working page much like it is accessible from the search page: https://search.maven.org/#search%7Cga%7C1%7C Follow the BROWSE link to: https://repo1.maven.org/maven2/
These appear all to be files that maven.org is happy to give you.